Car seems to surge randomly when its in drive.

DALFRARRON

MEMBER
1994 FORD EXPLORER
193,000 MILES

Car seems to surge randomly when its in drive then idles poorly at a stop in park or drive but returns to normal for short time. Have dtc trouble code 558. Replaced my dpfe sensor and my egr valve regulator, and egr valve, and my iac sensor with no success and still get the trouble code. Sounds like a popping noise coming from my throttle body or airbox. Egr valve also has no vacuum pressure going to it from the regulator. Vacuum pressure jumps and drops randomly when noise starts. Any suggestions? I'm running out of money and ideas. Only two sensors left to replace are my tps and my mad.

5 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Vacuum gauge rises and falls indicates a valve train issue. Have a compression test done to verify any failure/

Roy

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Friday, February 1st, 2013 AT 1:52 AM

DALFRARRON

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7 POSTS

It would only do it when it was missing. Replaced spark plugs. Old ones were fine but OEM. Upgraded to new ones. If it was valve train would of shown on plugs. Noticed my 6th cylinders boot was torn. Buying new wires. Will see if that was the problem. Also going to clean fuel system with techron

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Monday, February 4th, 2013 AT 11:33 PM

DALFRARRON

MEMBER
7 POSTS

Threw on new wires and started making a metal pinging noise then dpfe hose blew off. Have all my egr trouble codes back. Thinking maybe clog un my intake manifold of egr tube

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Friday, February 8th, 2013 AT 11:39 PM

DALFRARRON

MEMBER
7 POSTS

Please helppppppppp! I need this running or no work! Car motor is shaking like crazy, smoke coming from the exhaust but stops shortly after running. No clog in egr system. Maybe fuel pump or computer? Will post dtc codes to night

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Friday, February 15th, 2013 AT 6:18 PM

DALFRARRON